TUSCANY-3565 - Adding missing dojo extension provider

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@951583 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 106 insertions, 0 deletions

diff --git a/sca-java-2.x/trunk/modules/web-javascript-dojo/src/main/java/org/apache/tuscany/sca/web/javascript/dojo/DojoWidgetJavascriptProvider.java b/sca-java-2.x/trunk/modules/web-javascript-dojo/src/main/java/org/apache/tuscany/sca/web/javascript/dojo/DojoWidgetJavascriptProvider.java
new file mode 100644
index 0000000000..e69c2488ec
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/web-javascript-dojo/src/main/java/org/apache/tuscany/sca/web/javascript/dojo/DojoWidgetJavascriptProvider.java
@@ -0,0 +1,106 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.web.javascript.dojo;
+
+import java.net.URI;
+import java.util.logging.Logger;
+
+import javax.servlet.Servlet;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.host.http.ServletHost;
+import org.apache.tuscany.sca.host.http.ServletHostHelper;
+import org.apache.tuscany.sca.host.http.ServletMappingException;
+import org.apache.tuscany.sca.implementation.widget.javascript.WidgetImplementationJavascriptProvider;
+
+public class DojoWidgetJavascriptProvider implements WidgetImplementationJavascriptProvider {
+    private final static Logger logger = Logger.getLogger(DojoWidgetJavascriptProvider.class.getName());
+    
+    private static final String dojoBaseUri = URI.create("/dojo").toString();
+    private static final String dojoUri = URI.create("/dojo/*").toString();
+
+    private static final String tuscanyBaseUri = URI.create("/tuscany").toString();
+    private static final String tuscanyUri = URI.create("/tuscany/*").toString();
+    
+    private static int counter = 0;
+    
+    private ServletHost servletHost;
+
+    public DojoWidgetJavascriptProvider(ExtensionPointRegistry registry) {
+        this.servletHost = ServletHostHelper.getServletHost(registry);
+    }
+    
+    public void start() {
+        
+        if (servletHost == null) {
+            throw new IllegalStateException("Can't find ServletHost reference !");
+        }
+
+        Servlet servlet = null;
+        
+        servlet = servletHost.getServletMapping(dojoBaseUri);
+        if(servlet == null) {
+            try {
+                DojoResourceServlet baseResourceServlet = new DojoResourceServlet(); 
+                servletHost.addServletMapping(dojoBaseUri, baseResourceServlet);
+
+                DojoResourceServlet resourceServlet = new DojoResourceServlet(); 
+                servletHost.addServletMapping(dojoUri, resourceServlet);
+            } catch (ServletMappingException me ) {
+                logger.warning("Dojo already registered at :" + dojoBaseUri);
+            }
+        }
+
+        servlet = servletHost.getServletMapping(tuscanyBaseUri);
+        if(servlet == null) {
+            try {
+                DojoResourceServlet baseResourceServlet = new DojoResourceServlet(); 
+                servletHost.addServletMapping(tuscanyBaseUri, baseResourceServlet);
+
+                DojoResourceServlet resourceServlet = new DojoResourceServlet(); 
+                servletHost.addServletMapping(tuscanyUri, resourceServlet);
+            } catch (ServletMappingException me ) {
+                logger.warning("Tuscany dojo extensions already registered at :" + tuscanyBaseUri);
+            }
+        }
+        
+        counter += 1;
+        logger.info("Registered Dojo and Tuscany Dojo extensions (counter=" + counter + ")");
+    }
+
+    public void stop() {
+        if(counter > 0) {
+            counter = counter -= 1;
+            logger.info("Unregistering Dojo and Tuscany Dojo extensions (counter=" + counter + ")");
+        }
+        
+        Servlet servlet = servletHost.getServletMapping(dojoBaseUri);
+        if(servlet != null && counter == 0) {
+            servletHost.removeServletMapping(dojoBaseUri);
+            servletHost.removeServletMapping(dojoUri);
+
+            servletHost.removeServletMapping(tuscanyBaseUri);
+            servletHost.removeServletMapping(tuscanyUri);
+        }
+        
+        servletHost = null;
+
+    }
+}